TPS1689: Max GPIOx sink current

Tomasz Jastrzebski

Part Number: TPS1689

Hi TI,

What is the maximum sink current for GPIOx?
I am unable to locate this value in Section 6.7, PMBus and GPIO DC Characteristics.

Thanks,

Thomas

6 months ago

0 Amrit Jit 6 months ago

TI__Mastermind 46591 points

Hi Thomas,

Pull down resistance is 13 Ohms when asserted low.

you can calculate the sink current based on the resistance.

Thanks
Amrit

0 Tomasz Jastrzebski 6 months ago in reply to Amrit Jit

Intellectual 373 points

Hi Amrit,

Thank you for your swift response.

I meant to ask about the maximum sink current, not the actual current value.
In another words, what is the max dissipation power of this internal 13R resistor and the max drain current of the output transistor?
E.g. can it safely dissipate 5.2 mW power, which would allow for 20 mA current?

Another question: what is the maximum voltage for a logic-high output?
Does it equal Vin, or is it subject to some limitation?

Thank you,

Thomas

+1 Amrit Jit 6 months ago in reply to Tomasz Jastrzebski

TI__Mastermind 46591 points

Hey Thomasz,

Just checked the design results.

GPIO max sink current is 20mA.

Thanks

Amrit

0 Tomasz Jastrzebski 6 months ago in reply to Amrit Jit

Intellectual 373 points

Hi Amrit, Thank you!

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TPS1689: Max GPIOx sink current